New iodine-apatites: synthesis and crystal structure

Authors

EVGENY BULANOV
SERGEY PETROV
ALEXANDER KNYAZEV

DOI

10.3906/kim-2102-5

Abstract

The paper describes methods for the preparation of compounds with an apatite structure containing only iodine atoms in the "halogen" position. The crystal structure of the compounds was refined by the Rietveld method. The resulting apatites have a structure with a space group P63/m and have the following unit cell parameters: Ba4f 1.78(2) Ba6h 2.75(2)(PO4)3I0.04(2) (a = 10.18609(34) Å, c = 7.71113(30) Å, V = 692.889(54) Å3, R = 5.448%), Pb4f 1.82(2)Pb6h 2.75(2)(PO4)3I0.13(2) (a = 9.87882(18) Å, c = 7.43222(16) Å, V = 628.144(26) Å3, R = 8.533 %), Pb4f 1.90(2)Pb6h 2.68(2)(PO4)3I0.16(2) a = 9.87058(48) Å, c = 7.41255(46) Å, V = 625.437(72) Å3, R = 5.433 %). The study of the crystal structure showed a relatively low efficiency of the binding of iodine in the apatite matrix.

Keywords

Iodine, apatite, synthesis, crystal structure, Rietveld refinement

First Page

1444

Last Page

1453

Recommended Citation

BULANOV, EVGENY; PETROV, SERGEY; and KNYAZEV, ALEXANDER (2021) "New iodine-apatites: synthesis and crystal structure," Turkish Journal of Chemistry: Vol. 45: No. 5, Article 11. https://doi.org/10.3906/kim-2102-5
Available at: https://journals.tubitak.gov.tr/chem/vol45/iss5/11